No preview in Taskbar in Plasma 5.21 Wayland

Hi,
Since the update to KDE Plasma 5.21, preview images no longer appear in the task bar.
There are also problems with the right-click menu, it always closes by itself.

Does anyone know a solution?
Have already changed the compositor.

Everything works normally on X11.

Ok its a bug in plasma. Same situation in kde neon. The thing with the preview window got fixed with plasma 5.21.1

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